Lucy Brennan Key Takeaways
- The self-cleaning filter on Dacor DDW models still requires periodic manual inspection—fine particulate can accumulate and restrict drain flow.
- A kinked or improperly looped drain hose is one of the most overlooked causes of incomplete draining.
- Dacor dishwashers display error codes like E24 to indicate drain faults—check the control panel display at cycle end.
- A humming noise during the drain phase with no water movement confirms a blocked or failed drain pump.
- Garbage disposal knockout plug left in place after new installation is a common cause of drain blockage.
The Bottom Line
Dacor DDW dishwasher drainage failures almost always start at the filter or drain hose—both cleanable in minutes. If those components check out, the drain pump or control board requires professional service to avoid water damage from repeated flooding.
Dacor dishwasher not draining is one of the most common concerns for Dacor owners — here is everything you need to know.
A Dacor DDW dishwasher that finishes a cycle with standing water in the tub is not just an inconvenience—repeated incomplete draining can lead to odor, bacterial growth, and eventual pump damage. The good news is that the drainage path from tub to drain has only a few failure points, and most are accessible without special tools.
Drain Fault Diagnostic Overview
| Symptom | Error Code | Likely Cause |
|---|---|---|
| Water standing after full cycle | E24 | Clogged filter, kinked hose, or blocked pump |
| Water drains slowly, not fully | E21 | Partial blockage in filter or drain hose |
| Pump hums, no water movement | No code | Foreign object jammed in drain pump impeller |
| No drain attempt at cycle end | E25 | Drain pump failure or control board fault |
| Water drains mid-cycle then stops | No code | Air gap or high-loop missing, backflow from sink |
Step 1 — Clean the Drain Filter
Pull out the lower rack and locate the cylindrical filter assembly in the center-rear of the dishwasher tub floor. On Dacor DDW models, the filter system has a coarse mesh outer filter and a fine cylindrical microfilter. Twist the microfilter counterclockwise and lift both sections free. Rinse both under warm running water, using a soft brush to dislodge any embedded food particles. Inspect the filter housing recess for any debris that may have fallen through. Reassemble and run a short rinse cycle to test drainage before proceeding further.
Step 2 — Inspect the Drain Hose
Pull the dishwasher out slightly from its cabinet opening (after disconnecting power) to access the drain hose connection at the rear. The hose must loop up to the underside of the countertop—at least 20 inches from the floor—before connecting to the garbage disposal or drain air gap. A hose that drops directly from the dishwasher to the disposal without a high loop allows drain water to siphon back into the tub. Also check for kinks in the hose that could restrict flow. If the hose connects to a garbage disposal, ensure the disposal knockout plug was removed at installation.
Step 3 — Clear the Drain Pump
If the filter and hose are clear but the dishwasher still will not drain, a foreign object—a broken glass shard, a pit from stone fruit, or a small utensil component—may be jammed in the drain pump impeller. With power disconnected, remove all standing water with a turkey baster or wet-dry vacuum, then access the pump cover beneath the filter housing. Carefully remove any visible obstruction. If the impeller spins freely afterward, reassemble and test. A pump that hums but does not move water after clearing obstructions has likely failed internally and needs replacement.
Step 4 — Check the Air Gap (If Installed)
If your installation includes a counter-mounted air gap fitting, remove the cap and inspect the interior for debris. A clogged air gap restricts drain flow and can cause the dishwasher to stop mid-drain. Clean the air gap with a small brush and rinse thoroughly.
What to Know About Dacor dishwasher not draining
Drain pump replacement on Dacor DDW dishwashers requires removing the appliance from the cabinet and accessing the pump from the underside—a job that is straightforward for a technician but carries a risk of hose connection errors that could cause leaks. If your dishwasher displays persistent E24 or E25 codes after filter and hose service, or if you hear the pump motor running without any water movement, contact our Dacor service team to schedule a professional drain pump inspection and replacement.
Related Resources
The resources below offer related repair guides, error codes, and appointment booking.
For more information, visit Dacor Troubleshooting Resources.